Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Audrain County | 1 | 1 |
| Barry County | 1 | 5 |
| Benton County | 4 | 45 |
| Boone County | 8 | 23 |
| Butler County | 4 | 32 |
| Callaway County | 4 | 14 |
| Carroll County | 1 | 2 |
| Carter County | 4 | 34 |
| Cedar County | 6 | 14 |
| Chariton County | 1 | 38 |
| Christian County | 2 | 4 |
| Clay County | 8 | 34 |
| Cole County | 2 | 6 |
| Crawford County | 3 | 7 |
| Dade County | 2 | 3 |
| Daviess County | 1 | 1 |
| Franklin County | 1 | 1 |
| Gasconade County | 1 | 2 |
| Greene County | 3 | 3 |
| Henry County | 1 | 2 |
| Hickory County | 3 | 22 |
| Holt County | 1 | 1 |
| Howard County | 1 | 7 |
| Jackson County | 8 | 14 |
| Jefferson County | 1 | 2 |